EP 1141953 A1 20011010 - OPTICAL RECORDING MEDIUM AND METHOD FOR MAKING SAME
Title (en)
OPTICAL RECORDING MEDIUM AND METHOD FOR MAKING SAME
Title (de)
OPTISCHER AUFZEICHNUNGSTRÄGER UND HERSTELLUNGSVERFAHREN
Title (fr)
SUPPORT D'ENREGISTREMENT OPTIQUE ET PROCEDE DE REALISATION DE CE SUPPORT
Publication
Application
Priority
- FR 9903203 W 19991220
- FR 9816251 A 19981222
Abstract (en)
[origin: FR2787619A1] An optical recording support, includes a very thin metallic film (20) having reduced reflectivity after optical irradiation. An optical recording support consists of a substrate bearing a layer stack including a less than 30 nm thick metallic layer (20), which has a reflectivity of more than 65% before optical irradiation and of less than 35% after optical irradiation, and one or more transparent layers (21, 22). Independent claims are also included for the following: (i) a recordable optical disk (CD-R) comprising the above support; (ii) a recordable digital versatile disk (DVD-R) comprising the above support; (iii) a write once read many (WORM) optical disk comprising the above support; and (iv) a process for producing the above support by cathodic sputtering. Preferred Features: The very thin metallic film consists of aluminum, titanium, zirconium, tungsten, molybdenum, hafnium or their alloys.
IPC 1-7
IPC 8 full level
G11B 7/24 (2013.01); G11B 7/2578 (2013.01); G11B 7/2585 (2013.01); G11B 7/26 (2006.01); G11B 7/253 (2006.01); G11B 7/2533 (2013.01); G11B 7/257 (2013.01)
CPC (source: EP)
G11B 7/24 (2013.01); G11B 7/2578 (2013.01); G11B 7/2585 (2013.01); G11B 7/26 (2013.01); G11B 7/2533 (2013.01); G11B 2007/25713 (2013.01); G11B 2007/25715 (2013.01); G11B 2007/25718 (2013.01)
Citation (search report)
See references of WO 0038184A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
FR 2787619 A1 20000623; FR 2787619 B1 20010817; EP 1141953 A1 20011010; JP 2003511805 A 20030325; WO 0038184 A1 20000629
DOCDB simple family (application)
FR 9816251 A 19981222; EP 99961111 A 19991220; FR 9903203 W 19991220; JP 2000590169 A 19991220